in my osgEarth application, there is a building with lots of windows(texture).
my problem is that the windows become vague when the camera is far from the building, but i do not want to the effect.
i think the reason is about lod or sampling. So i want to know that are there some ways to disable this effect.
If you are creating buildings as in boston.earth, you don't have any control over the texture filtering (which might be what you are talking about). It is hard-coded in osgEarth. You may need to write custom code to change the filtering.